# just over 200km on a full tank of gas.

**URL:** <https://forums.speedlife.net/t/just-over-200km-on-a-full-tank-of-gas/103048>\
**Category:** SON240sx Automotive\
**Created:** [January 15, 2007, 12:40am UTC](https://forums.speedlife.net/t/just-over-200km-on-a-full-tank-of-gas/103048 "2007-01-15T00:40:40Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![Uniac](https://avatars.discourse-cdn.com/v4/letter/u/34f0e0/32.png) [@Uniac](https://forums.speedlife.net/u/Uniac)\
**Post date:** [January 21, 2007, 1:23pm UTC](https://forums.speedlife.net/t/just-over-200km-on-a-full-tank-of-gas/103048/24 "2007-01-21T13:23:47Z")

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> [@~\*OFFICIAL Buffalo Sabres Thread\*~](https://forums.speedlife.net/t/official-buffalo-sabres-thread/4208/1207):
>
> 12:1 on a NA motor I think is a little too rich, I think you can get away with a low to mid 13:1 afr running NA.

do some research or read a book please before you post mis-information.

I recommend “how to tune and modify engine management systems”

that is all.

\*after re-reading your post i see you put to mid 13’s,

13.5ish-14.5 is where you should be under load on a stock KA, at WOT the a/fs should dif slightly richer and then come back leaner as the o2 feeds back info to the computer.

Low load should be 15.1-mid 16’s. perhaps higher, i’ve seen sr’s as high as 17:1 under low load/rpm.

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